Answer: In resource files, use the window manager's client resource (which is the application) and the resource clientDecoration: Mwm*XClock.clientDecoration: none turns off all clock decorations. See the mwm(1) entry for other possibilities. Programmatically, set the VendorShell resource XmNmwmDecorations to appropriate values: MWM_DECOR_NONE (or a bitwise or of values).Go Back Up